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EP-4357535-B1 - SIDE GRIPPER FOR GRIPPING AND DRIVING A PILE

EP4357535B1EP 4357535 B1EP4357535 B1EP 4357535B1EP-4357535-B1

Inventors

  • Schäfer, Karsten
  • SPOHR, JOCHEN

Dates

Publication Date
20260513
Application Date
20231004

Claims (13)

  1. Side gripper (20) for gripping a piling element and driving it into a substrate, having a spring yoke (23), having an exciter cell (24) which is arranged in a sprung manner in the spring yoke (23), and having at least one clamping device (25) with two clamping arms (38, 39), wherein the two clamping arms (38, 39) are mounted on the exciter cell (24) so as to be pivotable around a pin (46, 47) in each case and the clamping arms (38, 39) are each connected to a single hydraulic cylinder (44, 45) by way of which the clamping arms (38, 39) are pivotable in relation to one another, characterized in that in that the two clamping arms (38, 39) pass through the spring yoke (23), wherein the pivot pins (46, 47) of the clamping arms (38, 39) are positioned within the spring yoke (23) and are integrated into the exciter cell (24), and the first and second ends (40, 41) of the clamping arms (38, 39) are situated outside the spring yoke (23).
  2. Side gripper (20) according to Claim 1, characterized in that the two clamping arms (38, 39) pivotable in relation to one another are arranged in a common plane.
  3. Side gripper (20) according to Claim 1 or 2, characterized in that the two clamping arms (38, 39) have a first end (40) and a second end (41), wherein, on the first ends (40), there is arranged in each case one biting-jaw carrier (42) for receiving biting jaws (43) and, on the second ends (41), there is articulated in each case one of the two hydraulic cylinders (44, 45).
  4. Side gripper (20) according to one of the preceding claims, characterized in that the two hydraulic cylinders (44, 45), in each case at one end, are connected to or mounted in the second ends (41) of the clamping arms (38, 39) and, at the other end, are fastened rotatably to a common cylinder suspension means (50).
  5. Side gripper (20) according to Claim 4, characterized in that the two hydraulic cylinders (44, 45), in each case at one end, are supported on one another at the cylinder suspension means (50).
  6. Side gripper (20) according to Claim 5, characterized in that the cylinder suspension means (50) is fastened to the exciter cell (24).
  7. Side gripper (20) according to one of the preceding claims, characterized in that the two hydraulic cylinders (44, 45) are operable independently or in a manner coordinated with one another, in particular in a synchronized manner.
  8. Side gripper (20) according to one of the preceding claims, characterized in that the rotary pin (46, 47) of the clamping arms (38, 39) is arranged, preferably exactly, between the first and second ends (40, 41).
  9. Side gripper (20) according to one of the preceding claims, characterized in that the exciter cell (24), in particular within its geometry, has two parallel bearing points (37) in which in each case one clamping arm (38, 39) is mounted rotatably at a rotary pin (46, 47).
  10. Side gripper (20) according to one of the preceding claims, characterized in that the exciter cell (24) has at least one drive (35), preferably a swivel motor, for adjusting an angular offset between multiple eccentrics of eccentric shafts (36), which exert a vibrational action on the clamping device (25) that is mounted rotatably on the exciter cell (24).
  11. Side gripper (20) according to one of the preceding claims, characterized in that the exciter cell (24) has spring elements (34) in order to decouple the spring yoke (23) from the vibrations that are generated.
  12. Side gripper (20) according to one of the preceding claims, characterized in that a coupling (21) for coupling the side gripper (20) to a working machine is fastened to the spring yoke (23), wherein said coupling (21) has a rotary and pivoting mount (22) with a rotary leadthrough.
  13. Side gripper (20) according to one of the preceding claims, characterized in that the spring yoke (23) has on a lower side a clamping device (26) for gripping further objects or for gripping the same piling element at a different position.

Description

The invention relates to a side gripper for grasping and driving in a pile material according to claim 1. To drive a pile, such as a pile, mast, profile, sheet pile, or the like, into the ground, it is known that this pile is grasped by a grab and driven into the ground under the influence of impacts or vibrations. The grab is connected to a work machine via one or more movable arms or booms, allowing the grab and the pile to be maneuvered. The work machine also supplies the grab with energy, particularly hydraulic energy. The grab, which can also be called a side grab because the pile is grasped laterally, is generally described in the text. WO 2013/124525 A1 The grab, as is known, has jaws attached to clamping arms. Actuators move the clamping arms in such a way that the jaws grip the pile. The grab also has a vibration device that transmits vibrations to the jaws and thus to the pile. To drive the pile, the grab grasps it and presses it into the ground in the intended orientation. The vibrations of the grab, which are transmitted to the pile, drive it gradually into the ground. Especially for gripping and driving the pile, it is of paramount importance that the gripper's contact pressure on the pile is sufficient. This is made more difficult by the vibrations that act on the entire system during driving. Often, with known grippers, the force transmission to the clamping arms is insufficient to apply the necessary pressure to the pile. This then leads to an unsatisfactory result, or the intended installation of the pile is simply not possible. The invention is based on the objective of creating a side gripper with which a pile can be reliably gripped and driven into a subsoil. A side grab for solving this problem has the features of claim 1. Accordingly, the side grab for gripping and driving a pile into a subsoil comprises a spring yoke, an exciter cell, and at least one clamping device. The exciter cell is spring-loaded within the spring yoke, and the clamping device is pivotably mounted in the exciter cell about at least one, preferably two, axes. The clamping device has two clamping arms, each connected to a single hydraulic cylinder. These hydraulic cylinders allow the clamping arms to pivot relative to each other. The side grab thus essentially consists of three nested units. While the spring yoke acts as a frame for the other two units, the exciter cell generates vibrations and transmits them to the clamping device via appropriate bearings. Furthermore, the exciter cell is supported relative to the spring yoke by spring elements, preventing the vibrations from being transmitted to the spring yoke. This special arrangement allows the force or pressure of the clamping device to be transferred to the pile with particular efficiency and reliability. At the same time, the vibrations or oscillations of the exciter cell are decoupled from the spring yoke by rubber springs, primarily serving to protect the machine. A particularly advantageous embodiment provides that the two pivotable clamping arms are arranged in a common plane. This arrangement of the clamping arms in a common plane allows, firstly, the effect of the hydraulic cylinders to be transferred to the clamping arms with particular efficiency, and secondly, the clamping force can be transmitted to the pile with high effectiveness. Furthermore, this arrangement The special arrangement makes the positioning of the hydraulic cylinders on the side gripper particularly simple and space-saving. Preferably, the invention further provides that the two clamping arms have a first end and a second end, with a jaw carrier for receiving jaws arranged at each of the first ends and one of the two hydraulic cylinders articulated at each of the second ends. The two flat jaws serve to grip the material being driven. When the two hydraulic cylinders are actuated, the two jaws are moved parallel to each other and opening towards each other. Because the hydraulic cylinders are attached to the opposite second ends of the clamping arms, the force can be transmitted particularly efficiently to the first ends of the clamping arms or the jaws via the large mechanical lever. In particular, the invention provides that the two clamping arms extend through the spring yoke, with the axes of rotation of the two clamping arms positioned within the spring yoke and integrated into the excitation cell, and the first and second ends of the clamping arms located outside the spring yoke. By positioning the axes of rotation of the two clamping arms within the spring yoke and integrating them into the excitation cell, the gripper design is particularly compact and safe. Because the axes of rotation are positioned within the spring yoke, the axes themselves, or the receptacles for them, can be integrated into the shape of the spring yoke, eliminating the need for additional components. The separation of the spring yoke and the excitation cell effectively decouples the high vibrational